Peter Cairns / Calcified trees at Tangled Creek in winter, Yellowstone National Park, Wyoming, USA, February 2013.

Fred Bavendam / Eyepatch Butterflyfish (Chaetodon adiergastos) school, Bali, Indonesia

Michele Westmorland / Large school of scalloped hammerhead sharks (Sphyrna lewini). Galapagos Islands.

Kirkendall-Spring / John Day Fossil Beds National Monument, Painted Hills Unit, Oregon, USA, May 2013.

Mark Raycroft / Bighorn Sheep (Ovis canadensis) rams in a line with one standing out front, North America

Mark MacEwen / American Alligator (Alligator mississippiensis) close up of scutes / scales, Florida Everglades, Florida, USA.

Juergen Freund / Fluorescent corals (Favia sp) Great Barrier Reef, Australia

Ernie Janes / Garden centre with potted Hyacinth bulbs, Edgefield, Norfolk, January

Gavin Hellier / Volcanic tufa rock formations, Uchisar, Cappadocia, Anatolia, Turkey, 2008

Claudio Contreras / Detail of Ocellated Turkey (Meleagris / Agriocharis ocellata) plumage. El Mirador-Rio Azul National Park, Department of Peten, Guatemala.

Claudio Contreras / Detail of Ocellated Turkey (Meleagris / Agriocharis ocellata) plumage. El Mirador-Rio Azul National Park, Department of Peten, Guatemala.

Juan Carlos Munoz / Abstract of reeds in front of lake with reflections, Plitvice Lakes National Park, Lika, Croatia, Europe, October 2011